Surface-roughness measurement instrument



FIG. 1 is a perspective view of a surface-roughness measurementinstrument.

FIG. 2 is a front view thereof.

FIG. 3 is a rear view thereof.

FIG. 4 is a left-side view thereof.

FIG. 5 is a right-side view thereof.

FIG. 6 is a top view thereof.

FIG. 7 is a bottom view thereof.

FIG. 8 is a cross sectional view taken along the line 8 to 8 in FIG. 6,in which internal mechanisms are omitted for clarity of illustration.

FIG. 9 is a cross sectional view taken along the line 9 to 9 in FIG. 6,in which the internal mechanisms are omitted for clarity ofillustration.

FIG. 10 is a top view thereof, in which a cover is slid and opened.

FIG. 11 is a perspective view thereof, in which the cover is slid andopened; and,

FIG. 12 is a perspective view thereof, in which a detector is taken outtherefrom.

The broken lines depict environmental subject matter only and form nopart of the claimed design.

We claim the ornamental design for a surface-roughness measurementinstrument, as shown and described.